八进制转换为二进制

include

include

long long convertOctalToBinary(int octalNumber);
int main()
{
int octalNumber;

printf("输入一个八进制数: ");
scanf("%d", &octalNumber);

printf("八进制数 %d 转二进制为 %lld", octalNumber, convertOctalToBinary(octalNumber));

return 0;

}

long long convertOctalToBinary(int octalNumber)
{
int decimalNumber = 0, i = 0;
long long binaryNumber = 0;

while(octalNumber != 0)
{
    decimalNumber += (octalNumber%10) * pow(8,i);
    ++i;
    octalNumber/=10;
}

i = 1;

while (decimalNumber != 0)
{
    binaryNumber += (decimalNumber % 2) * i;
    decimalNumber /= 2;
    i *= 10;
}

return binaryNumber;

}

输出结果为：

输入一个八进制数: 51
八进制数 51 转二进制为 101001